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Extinct Animal Questions
Topic Started: Nov 26 2013, 10:24 PM (193,297 Views)
stargatedalek
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I'm not slow! That's just my moe!

Well even the smaller mammoth were still very large, and given even polar bears can't tackle a healthy adult walrus I'd think such predators would be limited to young or unhealthy animals, pack hunters excluded.
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54godamora
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what was the largest terror bird?
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CyborgIguana
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By weight I'm pretty sure it was Brontornis, as for height I think Kelenken though I could be wrong.
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MightyFan217
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OH YESSS!

stargatedalek
Apr 20 2016, 07:51 PM
Well even the smaller mammoth were still very large, and given even polar bears can't tackle a healthy adult walrus I'd think such predators would be limited to young or unhealthy animals, pack hunters excluded.
So pack hunting animals like more modern day Gray wolves would be more than likely to go after an adult Mammoth rather than a sick or young specimen like other, lone predators would, ya?
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Ztlabraptor211
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I still think pack hunters would stick to small or weak individuals. Lions today attack and seldom bring down elephants, and lions are much stronger and heavier than wolves.
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babehunter1324
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Well there recently was a paper published on Smilodon populator diet and it appears Ground Sloths (the two species mentioned being the very massive Lestodon and the even more massive Megatherium) made a very significant ammout of their diet (only after Litopterans). So in theory during the late Pleistocene they were indeed predators that took on very large megafauna on regular bases.

That said isothopic studies reveal that nearly all mammalian carnivores that coexisted with mammoths and mastodons hunted them only very rarelly. The only exception being the Homotherium serum population in Friesanhahn cave which took on juvenile mammoth with a lot of regularity, worth noting however that isotopic studies on other populations of Homotherium show that they rarelly consumed mammoths so it is quite likely that the Texan pack of Homotherium was an outlier like the population of modern African Lion in Botswana that are specialized in hunting African Buffalo's and Elephants.
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stargatedalek
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I'm not slow! That's just my moe!

CyborgIguana
Apr 20 2016, 10:17 PM
By weight I'm pretty sure it was Brontornis, as for height I think Kelenken though I could be wrong.
Kelenken is known only from its skull, so being the largest is itself an estimate and if so it may have also been the heaviest.
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BossMan, Jake
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Son of God

I don't think so about weight, Kelenken despite being known from a skull and toe bone it's firmly placed within the Phorusrhacinae sub group of terror birds,‭ ‬and its remains suggest that it had a more gracile build when compared to the Brontornithinae group that contains large but more robust members such as Brontornis and Paraphysornis.

So it seems rather unlikely that an animal adapted for speed would be the heaviest of them all considering Brontornis is somewhere within the 800 pound range
Edited by BossMan, Jake, Apr 21 2016, 01:13 PM.
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Incinerox
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Āeksiot Zaldrīzoti

Kelenken was the Spinosaurus to Brontornis's T. Rex.

We both know them to be accurate and technical units of measurement, after all.

Fight me.
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BossMan, Jake
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Son of God

Titanosaurs IIRC had osteoderms across their bodies thanks to finds like Saltasaurus and Ampelosaurus but how come some new reconstructions depict them with HUGE triangular spines? What would've been their purpose?

Also just a recap was the dreadnoughtus specimen a Juvenile and if so what would've been the max adult size?
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babehunter1324
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BossMan, Jake
Apr 22 2016, 10:08 AM
Titanosaurs IIRC had osteoderms across their bodies thanks to finds like Saltasaurus and Ampelosaurus but how come some new reconstructions depict them with HUGE triangular spines? What would've been their purpose?

Also just a recap was the dreadnoughtus specimen a Juvenile and if so what would've been the max adult size?
The Dreadnoughtus individual was an adult just not fully grown.

As for Titanosaurus we have evidence that some of them did really had spikes:

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0102488

I also think they might be some evidence for spikes in Alamosaurus, though I might be getting it mixed with regular osteoderms.
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Incinerox
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Āeksiot Zaldrīzoti

Alamosaurus is the reason behind the big spikes.
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heliosphoros
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Incinerox
Apr 22 2016, 06:28 AM
Kelenken was the Spinosaurus to Brontornis's T. Rex.

We both know them to be accurate and technical units of measurement, after all.

Fight me.

Until a north american bathornithid shadows either of them.
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BossMan, Jake
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Son of God

So North America also gas giant flightless killer birds (minus Titanis)? great the American history just got even more complex
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heliosphoros
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Pretty much.
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